JPH0753884Y2 - Precision internal grinding machine for cylindrical parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a cylindrical part used to grind the inner surface of a cylindrical part formed from a ceramic material in a cylindrical shape with high precision. The present invention relates to a precision internal grinding machine.

2. Description of the Related Art Generally, an electronic component such as a core formed of a ceramic material is required to be ground on the order of microns, like a metal material. In particular, not only the dimensional accuracy of the inner diameter but also the processing accuracy of the micron order is required for forming complicated shapes such as stepping and grooving within the diameter.

Conventionally, as this kind of inner surface grinding machine, a work outer diameter shoe on which a cylindrical part is mounted on the outer peripheral surface and a work outer diameter surface which presses the work from the outer peripheral surface and presses the outer peripheral surface against the receiving surface of the work outer diameter shoe. There is known a centerless cylindrical inner surface grinding machine provided with a drive roller for a rotating workpiece and a grindstone that is moved forward within the diameter of the workpiece to grind the inner surface of the workpiece with a circumferential surface (Japanese Patent Laid-Open No. Sho 46-46). -1996).

With this centerless cylindrical inner surface grinder, the work can be easily attached and detached, and the inner surface can be stepped or grooved easily.However, as the work is pressed and rotated from the outer peripheral surface by the drive roller, Must be prevented from shifting to the left or right in the axial direction. Therefore, in addition to the driving roller that rotates the work, a pressing roller is provided or a flange portion that locks the work from each end surface direction is provided on the work outer diameter shoe. However, this is not preferable because not only the mechanism becomes complicated, but also the workable length of the work is restricted by the flange portion of the work outer diameter shoe.

DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention The present invention applies cylindrical inner surface grinding without a core and can reliably position a workpiece with a simple mechanism, and achieves high accuracy such as inner diameter dimensional accuracy, inner diameter roundness or step, groove position accuracy. An object of the present invention is to provide a precision internal grinding machine for cylindrical parts that can be machined.

Means for Solving the Problems In the precision internal grinding machine for cylindrical parts according to the present invention,
A work outer diameter shoe that is mounted on the outer peripheral surface on a flat L-shaped or V-shaped work receiving surface as a work, and a work outer diameter shoe that presses the work from the outer peripheral surface and receives the work outer diameter shoe. The drive roller of the work that rotates in pressure contact with the work piece, the grindstone that moves forward within the diameter of this work and grinds the inner surface of the work with the circumferential surface, and the work outer diameter shoe that is placed on the side of the work piece in the axial direction. And a work end face shoe that is received by one end face, and the drive roller is equipped as a work piece biasing roller by tilting the roller shaft by a predetermined angle with respect to the axial direction of the work and pressing the work from the outer peripheral surface, and It is configured by equipping the work end face shoe as a work positioning shoe that is biased by a drive roller.

Function With this precision internal grinding machine for cylindrical parts, the workpiece is placed in line contact with the flat surface of the outer diameter shoe of the workpiece and placed, and the work roller is pressed by the drive roller that presses the workpiece from the outer peripheral surface. Since the inner surface of the work is ground by the grindstone while being pressed against the receiving surface of the shoe and being rotated, the work can be easily attached and detached. In addition, by tilting the roller shaft of the drive roller by a predetermined angle with respect to the axial direction of the work and pressing and rotating the work from the outer peripheral surface by the drive roller, the work is biased and the end face on one side in the axial direction becomes the work end face shoe. Since the work is pressed and automatically positioned, the work can be reliably positioned and supported by a simple mechanism, and the inner surface can be stably ground by the grindstone.

Embodiments The following will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, this grinder includes a grindstone shaft motor 2 and a pulley box 3 on a bed surface of a bed 1, and a grindstone shaft motor 2 for driving a grindstone 5 provided at a tip of a spindle shaft 4 at high speed. The inner surface is ground by using the cylindrical part as a work by rotating. Spindle axis 4 is X
It is provided on an XY table including a direction moving table 6 and a Y direction moving table 7 which is placed on the table surface of the X direction moving table 6 and moves in the orthogonal direction. A hydro cylinder 8 is mounted on the table surface of the Y-direction moving table 7. In addition to each of these mechanical parts, the XY tables 6 and 7 can be controlled to move in the machining cycle by a fine adjustment mechanism for adjusting the position of the grindstone 5 and the hydrocylinder 8 to fast-forward and fast-return the grindstone 5 in the axial direction. A traverse mechanism during processing is provided. That
In addition to the XY tables 6 and 7, a work driving table 9 having a work holding mechanism and a driving mechanism is mounted on the bed surface of the bed 1.

A work outer diameter shoe 10 for holding the work on the outer peripheral surface and a work end surface shoe 11 for receiving the work on the end surface are provided on the work drive table 9. Work outer diameter shoe 10
As shown in FIG. 3, the workpiece vertical receiving surface 10a and the horizontal receiving surface 10b perpendicular to the vertical receiving surface 10a are provided with respective workpiece receiving surfaces 10a and 10b which are L-shaped flat surfaces. Has been. A drive roller base 12 is provided on the work drive base 9.
The drive roller 13 is attached via the. The drive roller 13 is rotated by a roller rotation motor 14, and the air cylinder 15
It is mounted so as to move forward and backward with respect to the work. The drive roller 13 is equipped as a biasing roller by tilting the roller shaft 13a at a predetermined angle with respect to the axial direction of the work and pressing the work from the outer peripheral surface. The biasing roller is, for example, the roller shaft 13 in FIG.
The roller shaft 13a may be attached to the drive roller base 12 by inclining the roller shaft 13a at a predetermined angle in the vertical direction so that the left side of a is in front of the plane of the drawing and the right side is inclined downward. With respect to the drive roller 13, the work end face shoe 11 is provided as a work positioning shoe by receiving the work that is biased by the drive roller 13 at the end face on one side in the axial direction.

In the precision inner surface grinding machine configured as described above, as shown in FIGS. 3 and 4, the work W is supported on the horizontal receiving surface 10 of the work outer diameter shoe 10.
Place it on b. Although this work can be easily placed by hand, it can be automatically performed by applying a loader device (not shown). Next, the drive roller 13 is brought closer to the work direction by the air cylinder 15, and the drive roller 13 is brought into contact with the outer peripheral surface of the work W at a constant pressure by performing a slight forward movement just before the work contact. The work W is pressed against the vertical receiving surface 10a of the work outer diameter shoe 10 by being pressed by the drive roller 13 from the outer peripheral surface with a constant pressure, and is rotated in the direction opposite to the rotation direction of the drive roller 13. To be In this state, the work W is supported stably from the place where the work W comes into line contact with the two surfaces 10a, 10b of the work outer diameter shoe 10, and can smoothly rotate. When the drive roller 13 presses the work W, the drive roller 13 rotates while tilting at a predetermined angle while pressing the work W against the two surfaces 10a and 10b of the work outer diameter shoe 10, so that the work W is offset. The work W can be automatically positioned by moving and pressing the end face on one side in the axial direction against the work end face shoe 11 with a constant pressure. During this rotation, the grinding liquid can be supplied by a supply means (not shown) if necessary.

From that state, the grindstone 5 rotating at high speed is the XY table 6,
At 7, the robot moves to a preset position and moves forward within the diameter of the work W according to the driving of the hydro cylinder 8. Thereafter, the X-direction moving table 6 is moved toward the vertical receiving surface 10a of the work outer diameter shoe 10 by a cam mechanism (not shown), whereby flange cylindrical processing or the like can be performed up to a predetermined position. In addition to this, it is possible to perform grooved or stepped processing by selecting the shape of the grindstone and the processing cycle. After the processing is completed, the X-direction moving table 6 returns to the original position, and the grindstone 5 moves in the backward direction from the inside of the workpiece W as the hydro cylinder 8 returns to the origin. Further, since the drive roller 13 also returns to the origin and the work W stops rotating, the work is replaced manually or by an automatic loader device. With such a series of operations, it is possible to repeatedly perform the process from the supply of the work W to the processing and taking out.

In this precision internal grinding machine, if an appropriate elastic body 13b is provided on the outer periphery of the drive roller 13, the frictional force between the work W and the drive roller 13 can be increased, so that the drive force of the drive roller 13 can be sufficiently transmitted to the work W. Not only can small dust be wiped off, but also vibration due to wear or eccentricity of the drive roller 13 can be absorbed. Further, the work outer diameter shoe 10 may be formed of a material such as SiC, Sin or the like which is hard to wear with respect to the work W and has a small frictional force. However, even if the wear increases, if workpieces with approximately the same diameter are used,
Since the line contact with the work is always at a substantially constant position, the usefulness as a mass production machine that can be used for a long period of time can be enhanced.

In the above-described embodiment, the work outer diameter shoe 10 is provided with the work receiving surfaces 10a, 10b formed in an L shape, but a work piece having a V shape having an acute angle, an obtuse angle, or the like may be similarly provided. You can In addition, this grinder is capable of machining the inner peripheral surface of a workpiece made of difficult-to-cut materials such as ceramics and ferrite cores, and the stepped groove machining of the inner peripheral surface, and the inner diameter dimension accuracy is within 5μ, and the circularity is within 3μ. Inner and outer diameter concentricity within 3μ, inner circumferential groove depth, and groove pitch accuracy from the end surface are all
High-precision grinding can be done within 10μ.

As described above, according to the precision inner surface grinding machine for cylindrical parts according to the present invention, the cylindrical work is received by the flat work receiving surface of the L-shaped or V-shaped outer diameter shoe of the work. Since the inner surface of the work is processed by the centerless system by pressing and rotating with the drive roller, the work can be easily attached and detached and the work of various sizes can be dealt with. In addition, the work is rotated by pushing the work with the drive roller and pressing it against the work end face shoe to automatically position the work, so that the work can be stably rotated with a simple mechanism and highly accurate grinding can be performed. You can

[Brief description of drawings]

FIG. 1 is a plan view of an inner surface grinding machine according to an embodiment of the present invention, FIG. 2 is a front view of the same apparatus, and FIGS. 3 and 4 are enlarged views of a drive roller and a work shoe assembled in the apparatus. It is an explanatory view shown. W: Work, 5: Whetstone, 10: Work outer diameter shoe, 10a, 10b: Work outer diameter shoe receiving surface, 11: Work end surface shoe, 13: Drive roller, 13a: Roller shaft.

 ─────────────────────────────────────────────────── ───Continued from the front page (56) References JP-A-46-1996 (JP, A) Actually opened 62-46544 (JP, U) Actually opened 48-79693 (JP, U) Actually opened 53- 119691 (JP, U) Japanese Patent Publication No. 40-13636 (JP, B1)

Claims (1)

[Scope of utility model registration request] 1. A work outer diameter shoe (10) mounted on the outer peripheral surface of an L-shaped or V-shaped flat work receiving surface (10a, 10b) as a work (W), and the work (W). ) Is pressed from the outer peripheral surface and the outer peripheral surface is pressed against the receiving surfaces (10a, 10b) of the work outer diameter shoe (10) to rotate, and the drive roller (13) of the work (W) and the work (W). Of the grindstone (5) which is moved forward within the diameter of the work to grind the inner surface of the work by the circumferential surface, and the work (W) which is arranged on the side of the work outer diameter shoe (10) and receives the work (W) by the end surface on one side in the axial direction. A workpiece end face shoe (11), and the drive roller (13) is formed by inclining the roller shaft (13a) by a predetermined angle with respect to the axial direction of the workpiece (W) and pressing the workpiece (W) from the outer peripheral surface. Equipped as a (W) biasing roller, and drives the work end face shoe (11). La (13) that equipped with a positioning shoe workpiece (W) which is biased by a precision internal grinding of cylindrical components that characterized.